Municipal sludge co-treatment method

Abstract

The invention relates to a municipal sludge co-treatment method. Municipal sludge and one or more urban organic wastes are subjected to synergistic anaerobic digestion, and various benign complementation can be established between the municipal sludge and the organic wastes and between the organic wastes while the municipal sludge and one or more urban organic wastes are subjected to the synergistic anaerobic digestion; for example, the concentration of heavy metals in the sludge and the concentration of salt in the organic waste can be diluted through co-digestion of municipal sludge and municipal organic waste, the inhibiting effect of toxic substances on anaerobic microorganisms in the anaerobic digestion process is reduced, the concentration of oil in a digestion substrate is reduced,and the risk of oil particle formation is reduced; municipal organic waste and municipal sludge are co-digested, so that nutritional ingredients lacking in respective ingredients can be mutually supplemented, and the carbon-nitrogen ratio of a digestion substrate is adjusted to an appropriate range of anaerobic digestion; compared with single treatment, the urban organic waste and the municipal sludge are co-digested, so that the capital construction and operation cost can be reduced, and better economic benefits are achieved.

Description

technical field [0001] The invention relates to the technical field of an environmental protection treatment method for urban organic waste and domestic sludge, in particular to a municipal sludge collaborative treatment method. Background technique [0002] With the development of the economy and the improvement of people's living standards, the municipal sewage industry is also facing increasing pressure. The amount of domestic sewage is increasing, and more and more domestic sludge is brought. [0003] Traditional municipal sludge treatment methods mainly include incineration, filling, land use, anaerobic digestion and other methods. The cost of using the incineration method is too high, and the resource utilization rate is low; the landfill method has gradually lost land to be buried in today's land shortage; and the land use also has problems such as poor paths. [0004] Research in the United States in 1989 showed that for a certain scale of sewage treatment plants, a...

AI Technical Summary

Problems solved by technology

However, compared with other organic wastes, the organic matter content of municipal sludge is low, and anaerobic digestion alone generally has the problems of low carbon-nitrogen ratio and low gas production rate.

Other municipal organic wastes have a high content of organic matter and have a good potential for anaerobic digestion to produce methane. However, acid inhibition and ammonia nitrogen inhibition are prone to occur in the anaerobic digestion process alone, resulting in slow digestion process and even failure of start-up operation.

Images